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By Sgoody

United Kingdom Gb

my neighbour has a large well established rhododendron that has now developed a black, sticky residue on the leaves and dead buds. It seems to be spreading to another rhod planted next to it. No insects apparant. Can you help? Thanks



No, but I would be taking both out now and disposing of them before other rhododendrons became affected.

24 Apr, 2011


Could the residue be from honeydue secreted by aphids from an overhanging tree? the buds are they dead through winter damage or lack of water? they need to be kept well watered through the summer whilst forming the flower buds, feed two/three weeks with ericacious feed, julien.

24 Apr, 2011


thanks for the advice. i will pass it on to her!

25 Apr, 2011

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